Shedding mechanism for looms



(No Model.) 4 Sheets-Sheet 1. J. H. STONE. SHEDDING MECHANISM FOR LOOMS.

No. 452,396. Patented May 19,1891.

(No Model.) 4 SheetsSheet 2.

J. H. STONE.

SHEDDING MECHANISM FOR LOOMS. No. 452,396. Patented May 19, 1891.

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J. H. STONE. SHEDDING MECHANISM FOR LOOMS.

No. 452,396. Patented May 19,1891.

IllIFl LIUi'tIZEEEIE E (No Model.) 4 Sheets-Sheet 4.

J. HISTONE. SHEDDING MECHANISM FOR LOOMS.

No. 452.396. Patented May 19,1891.

M! Q MA UNITED STATES PATENT OFFICE.

JOSEPH HENRY STONE, OF NORTH ANDOVER, MASSACHUSETTS.

SH EDDING MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 452,396, dated May 19,1891. Application filed November 26, 1890. Serial No. 372.654. (Nomodel.)

To all whom. it may concern.-

Be it known that I, JOSEPH HENRY SroNE, a citizen of the United States,residing'at North Andover, in the county of Essex'and State ofMassachusetts, have invented a new and useful Shedding Mechanism forLooms, of which the following, together with the accompanying drawings,is a specification sufficiently full, clear, and exact to enable personsskilled in the art to which this invention appcrtains to make and usethe same.

This invention relates to shedding mechanism or harnessoperating devicesfor a closed-shed loom; and it consists in an improved construction andarrangement of mechanism wherein the parts are disposed, combined, andorganized for operation sub stantially as illustrated and explained, theparticular subject-matter claimed bein g hereinafter definitelyspecified.

In the drawings, Figure 1 is a plan view of such parts of a loom as willshow the nature of my invention. Fig. 2 is a vertical sectional View ofthe same. Fig. 3 is a detail View showing the ratchet for operating thepattern-chain. Fig. 4c is a diagram showing a modification in theconnectionsfor oscillating the cylinder-gears. Fig. 5 is a verticalsectional View showing the mechanism as arranged with theconnecting-bars below the ends of the vibrator-bars and withfrictionsprings for preventing rotation of the vibrator-gears whenchanging from one cylinder-gear to the other.

Referring to parts, A denotes the frame, of suitable form for supportingthe operating parts. Y

B and B indicate two cyhnder-gears, the shafts or journals of which arerespectively mounted to turn in bearings fixed on the frame A.

0 indicates the change-levers or vibratorbars respectively fulcrumed attheir outer ends upon the frame or support bar a and provided withcrank-gears D, axially ournaled to their inner ends and disposed at aposition for convenient engagement with either of the two cylinder-gearsB and B, the latter being arranged at such distance apart as willaccommodate said crank-gears D between them with sufficientclearance-space to allow said crank-gears, when in mesh wlth either ofsaid cylinder-gears, to stand ontirely free from the othercylinder-gear, and so that they can vibrate from one to the otherwithout shifting teeth in their order of intermeshing therewith.

E denotes the links or connecting-bars,

manner.

The axle or shaft of one of the cylindergears has a pinion or gear I,fixed thereon, that engages with a reciprocating rack J, that moves insuitable guides 2', supported on the frame. A cam K, fixed on the end ofthe crank-shaft L of the loom, imparts motion to said rack, the partsengaging by a stud and roll, as at Z, or in any suitable-and efficientmanner for transmitting the power and motion to the cylindergears. Thegroove or face of cam K, it will be understood,'is of such shape as toimpart the required quality and quantity of motion at the properinterval of time, so that the shedding mechanism will operate with therequired intervals of action and dwell. The cam K and rack J impart anoscillative action to the gear I and cylindergear 13, and the upper andlower cylindergears or their shafts b are connected by a pair ofsegmentgears m m, that intermesh with each other in a manner to causethe two cylinder-gears to have oscillative action in unison, but inopposite direction to each other, and to an extent of about one-third ofa revolution, more or less, so that the vibrator-gears in mesh with onecylinder-gear will be given a quarter-revolution toward the right, whilethose vibrator-gears in mesh with the other cylinder-gear will be givena quarter-revolution to the left and both back to first position withthe backward and forward oscillation of the cylinders or at eachrevolution of the loom-shaft.

Evener-bars n n are preferably arranged at either side of the jacks G tomove in suitable guideways n on the frame. Said eveners are joined byrods or connections F and F with cranks or studs f, supported in disks1),

fixed to the oscillating cylinder-gear axle at the ends of thecylinder-gear, or, if in any instance preferred, directly to thecylinder-gear end, whereby the evener-bars are caused to move back andforth synchronously with the jacks and to confine the jacks frommovement when at central position, as in dotted lines, Fig. 2, duringthe time the vibrator-gears are passing from the lower to the uppercylindergear, or vice versa. For holding the crankgears in mesh with thecylinder gear the well-known knife-lock can be employed.

Curved springs as are preferably attached to the vibrator-bars andarranged to press upon the gears D to prevent them from jarring orturning out of place while shifting from one cylinder-gear to the other.Said springs are best fastened to the vibrator-bar by two screws, one ofwhich will allow adjustment for varying the pressure of the spring uponthe gear.

The pattern-chain P is mounted upon the roll or drum P and disposedbeneath the vibrator-bars in such manner that the balls, risers, orindicators of the chain will, as they are successively brought intoposition, lift the respective vibrator-bars accordingly as theindicators are disposed. The vibrator-bars are fitted with suitablebearing-surface c where they rest upon the pattern-iindicators. Thepattern-chain roll can, if desired, be operated by means of thewell-known Genevastop mechanism heretofore employed for such purposes orby other suitable mechanism, whereby intermittent motion is imparted forchanging the links of indicators beneath the row of vibrators. In thepresent instance the pattern-roll shaft is provided for its operationwith the well-known form of ratchet and pawl, as at P said pawl beingpivoted to a swing-lever t, mounted on the shaft and having its armconnected bya rod T with a lever R, that works in conjunction with a camIt, fixed on the loom-shaft L, fol-imparting movement to thepattern-chain mechanism. The lever R is best provided with a spring 0',for holding its end or engaging-roll against the face of the cam.

The cylinder-gears ean,as desired, be made with teeth about their entirecircumference, or with teeth only 011 one side or so much as engageswith the vibrator-gears at their oscillation. The full-toothed cylinderadmits of changing its position upon its shaft when one set of teethbecome worn, so as to bring another set of teeth to the work.

It will be understood that the parts of the loom that are not hereinshown or described can be of any well-known or suitable con structionand arrangement.

In the operation the eylinder-gears L B move with a backward and forwardoscillative action with a slight stop or dwell at their extremes ofmovement. The vibrators 0, controlled by the indicators of thepattermehain, carry the crank gears into mesh with one or the other ofthe cylindengears, the change in position of the vibratorsheingel'fccted at the instant when all of the jacks G are at centralposition, (see dotted lines, Fig. 2,) and being then held by thecvener-bars n n, at which time the crank-pivots in gears D are at thehalf-way position, either directly above or below the gear center,accordingly as the construction is with the connections above thevibrator-bars, as in Fig. 2, or below the vibrator-bars, as in Fig. 3.As the two cylinder-gears are oscillated, all these vibrators orcrank-gears in engagement with one cylinder-gear throw their jacks andconnections to the left and all those in engagement with the othercylinder-gear throw their jacks and connections to the right, theconnections and jacks moving to the positions indicated in full lines,Figs. 2 or 5, and then back again to a central position at each beat ofthe loom or rotation of the loom-shaft L.

In the diagram Fig. 4 I have illustrated a way in which the oscillatingcylinder-gears can be connected in lieu of the segmentgears m m. In thisthe cylinder-gears are each provided with an arm or crank in, projectingat opposite positions, and the two cranks con nected to each other by adiagram-bar m"; also, if in any instance desired, a crank K and rod Jcan be employed in lieu of the cam for imparting the oscillative actionto the cylinder-gears in unison with the beat of the loom. I prefer,however, to employ the cam, as the timing of the movements and dwellscan be more accurately attained thereby.

By the use of the oscillating cylinder-gears in combination withvibrator-bars carrying crank-gears with the jack-connections piv otedthereto an easy and efficie'nt action is produced and the change ofposition in the intermesh of the gearing is effected when the severalgears are not in rotative motion.

I claim as my invention herein to be secured by Letters Patent 1. Acylinder-gear having backward and forward oscillative action, incombination with vibrator-bars carrying rotatable crankgears, the jacksand connections between the jacks and crankgears for operating the jacksin the shedding mechanism of a loom, and means, substantially asdescribed, for imparting motion to said cylinder and for moving thevibrators to shift said crank-gears into and out of engagement with saidcylindergear, for the purpose set forth.

2. Thetwo oppositely-actin g oscillating cylinder-gears, in combinationwith the vibratorbars having the vibratorgears supported thereon, thecrank-gears, the jacks, connections between the jacks and crank-gearsfor moving the jacks, and means for imparting motion to saidcylinder-gears, for the purpose set forth.

The combination of the upper and lower oscillative cylinder-gears, thevibrator-bar having the crank-gear supported thereon, the jack and theconnection between the crankgear and jack, the pattern-chain, thereciproeating rack, and means, substantially as described, for impartingmotion to said rack, all substantially as set forth.

4. The combination of the crank-shaft L, the cam K on said shaft, thereciprocating rack J, operated by said cam, the cylindergear providedwith a gear I, that engages said rack, the vibrator-bars, thecrank-gears, and jack-connections, substantially as and for the purposeset forth.

5. The combination, substantially as described, with the jacks,jack-operating connection, crank-gears, and vibrator-bars carrying saidcrank-gears, of the backwardly and forwardly oscillating cylinder-gearB, the

crank-studs f, supported in disks fixed to the oscillating cylinder-gearaxle at the ends of said cylindergear, the evener-bars n 12, mounted atopposite sides of said jacks in guideways on the frame, and theconnections F F between said evener-bars and said crankstuds, all asshown, and for the purpose set forth.

Witness my hand this 20th day of November, A. D. 1890.

JOSEPH HENRY STONE.

